Purple Nut Sedge (Mothey Jhar)

Catalogue Type

Weed Catalogue

Scientific Name

Cyperus rotundus L.

Family

Cyperaceae

Distinguishing Characters

the world’s worst weed; C4 plant; saline-sensitive;
tubers may be viable for several years; tubers consumed
by humans; forage

Photo of Weed

Description

Found in: upland Establishment method: DS
Growth habit: erect; tubers in chains on rhizomes; up
to 0.7 m Emergence time: simultaneous with rice
Moisture: dry to moist Competitiveness: moderate to low, but competitive early Seed contaminant: yes Cultural control: stale seedbed; suppressive crop with narrow rows; high plant density; fl ooding suppresses
growth but does not kill tubers; interrow cultivation
Reported resistance: none Life cycle: perennial Seed wt: 0.1
Method(s) of reproduction: tubers, rhizomes
Maturity time: from 21 to 56 d Dormancy: yes, apical dominance in tubers
Elevation: up to 1,800 m Light: sunny; shade-sensitive